RU168167U1 - Massive component circuit board - Google Patents

Abstract

The utility model relates to methods for the production of electronic devices containing massive components, such as electromechanical relays. The printed circuit board includes a plate 5 with a conductive pattern on its surface. An integrated component 7, for example, an electromechanical relay, is placed in the hole 6 of the plate 5. The contacts of component 7 are in the form of legs 8, bent on opposite sides of component 7 in such a way that their ends are located close to the side surfaces of component 7 and rest with their ends on the surface of the plate 1. The utility model makes it possible to install case components with a thickness exceeding the thickness on a printed circuit board printed circuit board, and also has a simpler installation technology that does not require chemical processes.

Description

The utility model relates to methods for the production of electronic devices containing massive components, such as electromechanical relays.

In modern electronic devices, various components have a wide range of weight and size characteristics. A typical example would be the difference between an SMD resistor and an electromechanical relay, but the miniaturization requirements of the devices impose serious restrictions on the use of bulky components. For vehicle theft protection devices (HARDWARE) against theft, miniaturization of engine blocking devices (traffic blocking) is critical, because current anti-theft trends include the installation of interlocks inside the vehicle wiring harness. It is at this moment that the disadvantages associated with the dimensions of the electromechanical relays are manifested. To minimize the thickness of the device, the method of installing the relay in the gap of the printed circuit board (PCB) is widely used, however, this method in its modern implementation has two significant drawbacks: high complexity and low reliability. High laboriousness is obtained through the use of manual work.

The currently widely used connection of a printed circuit board with a massive component, for example, an electromechanical relay, is shown in the circuit of FIG. eleven]. Relay 2 is installed at the end of circuit board 1, and since the thickness of board 1 is less than the distance between contacts 3 of the relay, half of the contacts 3 have to be connected to the board 1 using jumpers 4, which is extremely difficult to automate, and therefore soldering is carried out in the most expensive way - manually.

The second drawback, low reliability, follows from the fact that the relay, having a significant mass, is fixed cantilever. Such a fastening leads to the creation of a breaking load on the contacts, significantly exceeding that laid down by the relay designers, since a similar installation method is not provided for them. This is especially important for automotive applications, as significant vibrations are present in the vehicle.

Closest to the proposed one is a printed circuit board in which components (microcircuits) are embedded in the through holes made in the plate of the board, while the microcircuits are glued to the adhesive tape glued to the plate from the bottom side, then the hole is filled with epoxy resin to fix the microcircuit into the hole and remove the adhesive tape. The electrical contact of the component terminals with the conductive pattern of the printed circuit board is carried out by increasing the conductive material on the contact terminals of the microcircuit without soldering using printed circuit board technology (RU 2297736 C2, publ. 04/20/2007) [2].

A disadvantage of the known printed circuit board [2] is the need for complex work to install the component, in particular, filling with a compound and creating a conductive layer. It is also worth noting that the technical solution [2] was developed for open-circuit microcircuits.

The objective of the utility model is the miniaturization of devices containing components with relatively high overall dimensions.

The technical result of the utility model is to enable simple (without the use of complex technological processes) installation of components without compromising the reliability of electrical contact while reducing the height of the assembled printed circuit board by the thickness of this board.

The technical result is achieved by a printed circuit board including a plate with a conductive pattern on its surface and an integrated component located in a through hole made in the plate and connected by its findings to a conductive pattern in which the conclusions of the embedded component are made in the form of legs bent on opposite sides of the component so that their ends are located close to the side surfaces of the component and rest with their ends on the surface of the plate.

The utility model is illustrated by drawings.

In FIG. 1 shows a diagram of a known printed circuit board [1].

In FIG. 2 shows a leg-mounted component.

In FIG. 3 - the same, with bent legs.

In FIG. 4 - printed circuit board with integrated component, side view.

In FIG. 5 - same, top view.

The printed circuit board includes a plate 5 with a conductive pattern on its surface. A massive built-in component 7, for example, an electromechanical relay, is placed in the hole 6 of the plate 5. The contacts of component 7 are in the form of legs 8.

When embedding component 7 at the preliminary stage, legs 8 are formed, which does not require a special conductor and any highly qualified employee. For forming it is enough by pressing component 7 on the case (for example, a relay) to bend legs 8 to it close to the side surface on each side. The housing of component 7 serves as a natural limiter. After molding, component 7 is installed on the board in the hole 6. The protruding legs 8 serve as a limiter, preventing component 7 from falling through. Thus, a high repeatability of the process is achieved, which does not have a critical dependence on the qualifications of the employee. Soldering the legs 8 to the conductive pattern of the board with this installation method is possible not only manually, but also by wave or by melting the solder paste in the furnace, which, in aggregate, significantly reduces the cost of assembly of the devices. The molding of the contacts of the component 7 in the opposite direction allows to achieve high mechanical strength due to the fact that in this position, being soldered, the contacts (legs 8) are not able to bend due to their geometry. Thus, the component 7 is protected from horizontal shift by the plate 5 of the printed circuit board, and vertical bending is prevented by the bending of the legs 8. Installation without bending the legs will lead to the fact that when the device is used in a non-rigid body, for example, in a heat shrink tube, the legs 8 can be broken off due to the ability of the component to move along the vertical axis.

Compared with [2], the proposed utility model has the following advantages: the ability to install case components with a thickness exceeding the thickness of the printed circuit board; simpler installation technology that does not require chemical processes (compounding, electrochemical build-up of the conductive layer).

The proposed device can be manufactured in practice at the existing level of technology. Moreover, the applicant has manufactured and tested various versions of the device, in particular, “Implant 1A (2x3) blocking relay”.

The manufactured device confirmed all the declared advantages: reducing the thickness of the device, high productivity during assembly and high mechanical reliability.

Claims (1)

A printed circuit board including a plate with a conductive pattern on its surface and an integrated component located in a through hole made in the plate and connected by its contacts to the conductive pattern, characterized in that the contacts of the integrated component are made in the form of legs bent on opposite sides of the component so so that their ends are located close to the side surfaces of the component and rest with their ends on the surface of the plate.

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